Texas Attorney General Greg Abbott announces his bid for governor July 14, 2013, in La Villita.

Photo: Edward A. Ornelas, San Antonio Express-News

Texas Attorney General Greg Abbott announces his bid for governor...

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State Sen. Jose Rodriguez, D-El Paso, celebrates with the Forth Worth Democrat after her filibuster to defeat the anti-abortion bill SB5, up for a vote on the last day of the legislative special session June 25, 2013.

Photo: Erich Schlegel, Getty Images

State Sen. Jose Rodriguez, D-El Paso, celebrates with the Forth...

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Her pink sneakers become an icon for Fort Worth Sen. Wendy Davis' filibuster.

Photo: TOM REEL, San Antonio Express-News

Her pink sneakers become an icon for Fort Worth Sen. Wendy Davis'...

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State Sen. Leticia Van de Putte cheers at a watch party Oct. 3, 2013, at the San Antonio Firefighters Banquet Hall as Wendy Davis announces her campaign for governor.

Photo: Edward A. Ornelas, San Antonio Express-News

State Sen. Leticia Van de Putte cheers at a watch party Oct. 3,...

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Texas Attorney General Greg Abbott announces his bid July 14, 2013, in La Villita in San Antonio.

Abbott has promised to downsize government, set "real spending limits in Austin" and stroked social conservative fires by saying, "Our priorities are wrong when we live in a state that stops a valedictorian from mentioning God but doesn't stop drug cartels crossing our border."

Photo: Pat Sullivan, Associated Press

Abbott has promised to downsize government, set "real spending...

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Davis, 50, rocketed to national fame this summer with her filibuster against tighter abortion restrictions, stoking the hopes of Democrats who haven't won statewide office in Texas since 1994.

Photo: Smiley N. Pool, Houston Chronicle

Davis, 50, rocketed to national fame this summer with her...

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Abbott, shown at an anti-abortion rally at the Texas Capitol, hopes to seize the fiercely socially conservative mantle of Gov. Rick Perry that has helped make Texas the country's largest red state.

Photo: Eric Gay, Associated Press

Abbott, shown at an anti-abortion rally at the Texas Capitol, hopes...

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Davis stands wither her daughters Dru, left, and Amber as wells her and boyfriend, former Austin Mayor Will Wynn, after she announced her candidacy Oct. 3, 2013.

Abbott attends the Republican National Committee press conference to announce its grassroots team who will strengthen ties with Hispanic Republicans on Oct. 9, 2013, in Houston.

Photo: Mayra Beltran, Houston Chronicle

Abbott attends the Republican National Committee press conference...

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Davis speaks at a July 25, 2013, fundraiser in Washington.

Photo: Nick Wass, Associated Press

Davis speaks at a July 25, 2013, fundraiser in Washington.

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Former state Rep. Aaron Pena greets Abbott during the Oct. 9 Republican National Committee session in Houston.

Photo: Mayra Beltran, Houston Chronicle

Former state Rep. Aaron Pena greets Abbott during the Oct. 9...

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Davis speaks during a press conference at Houston City Hall where she, Mayor Annise Parker, Councilwoman Ellen Cohen and Harris County Sheriff Adrian Garcia reiterated the fact that there is no longer a backlog of rape kits in Houston on Oct. 9, 2013.

Photo: Johnny Hanson, Houston Chronicle

Davis speaks during a press conference at Houston City Hall where...

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"Piecing my life back together began with doctors piecing my vertebrae back together," Abbott told supporters during his announcement, noting physicians inserted rods in his back. "Too often, you hear politicians talk about having a spine of steel. I actually have one."

Photo: Darren Abate, Associated Press

"Piecing my life back together began with doctors piecing my...

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Supporters cheer for Davis at the W.G. Thomas Coliseum in Haltom City on Oct. 3, 2013. She chose the location to announce because that is where she walked the stage to accept her high school diploma.

Photo: Stewart F. House, Getty Images

Supporters cheer for Davis at the W.G. Thomas Coliseum in Haltom...

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Abbott's campaign kickoff in downtown San Antonio came 29 years to the day after a freak accident left Abbott partially paralyzed.

Photo: Edward A. Ornelas, San Antonio Express-News

Abbott's campaign kickoff in downtown San Antonio came 29 years to...

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Davis stands on a nearly empty Senate floor as she filibusters in an effort to kill an abortion bill June 25, 2013, in Austin. The bill would ban abortion after 20 weeks of pregnancy and force many clinics that perform the procedure to upgrade their facilities and be classified as ambulatory surgical centers.

Photo: Eric Gay, Associated Press

Davis stands on a nearly empty Senate floor as she filibusters in...

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Davis stretches during her filibuster June 25, 2013, in Austin.

Photo: Eric Gay, Associated Press

Davis stretches during her filibuster June 25, 2013, in Austin.

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Fort Worth Senator Wendy Davis relieves pressure on her feet as she filibusters in an effort to cause abortion legislation to die without a vote on the floor of the Senate Tuesday, June 25, 2013.

Delp said it was “an honor” to work for the Democratic senator, who faces Republican Attorney General Greg Abbott. He said that he is confident in her candidacy and that he will support her “wherever and whenever possible.”

“I am proud of the work I have done, and know that my successor will continue to build on my successes, and my mistakes, to do what is necessary to win in November,” Delp said in a letter of resignation dated Tuesday.

Davis reorganized her communications department earlier this year after running into some tough sledding with the media.

Zac Petkanas, U.S. Senate Majority Leader Harry Reid's former communications director, became Davis' communications director in March. Delp had stayed on as deputy communications director. Delp said Thursday that he is “considering a number of other opportunities in Texas Democratic politics.”

“After eight months of service, Bo offered his letter of resignation to the campaign. He is leaving the campaign to consider a number of other opportunities in Texas Democratic politics,” Petkanas said. “The campaign and Wendy Davis thank him for his hard work. He is someone who is extraordinarily talented and has a very bright future in Texas politics.”